B'Sha'ah tovah!
1) It is safe to bathe during the first trimester. There is some concern about very hot baths at this stage of pregnancy but using warm water for
chafifa is fine.
2) Clean out as much residue as possible without irritating yourself, but anything that remains is not considered a
chatzitzah.
3) Any progesterone residue from your body is miniscule and will not affect other women using the mikvah.
Please feel free to get back to us with any further questions.
We wish you a smooth and healthy pregnancy!